Other forms: schoolboys
A schoolboy is a boy who attends school. Uniform, satchel, and somewhere else he would rather be.
The word is slightly old-fashioned in the plain sense, since most modern writing says pupil or student. It survives strongly as an adjective describing behaviour and mistakes, so a schoolboy error is a basic and embarrassing one, and schoolboy humour is exactly what it sounds like. The matching word is schoolgirl. There is a whole genre of British fiction built around the schoolboy that shaped the language for a century.
1nounschoolboyA boy attending school.
“He has supported the club since he was a schoolboy.”
From school + boy.
Etymology from Wiktionary, CC BY-SA